Knowing which games this is happening with might help. I've noticed some games are quicker than others, but I don't think steam closes games, so it's on the game to close its own process.
I have had this issue before and it’s been happening on Steam Deck the past couple weeks. On desktop I just restart Steam, on Steam deck you can force close the app. Pretty annoying.
Yes. This has been happening to me since the steam update on July 15th (as far as I can tell).
Having to reset the PC to address the issue. Haven't had this on any of the steam decks but I has happened on two of my pc's